摘要
采用弹性环氧树脂、憎水型固化剂、改性nano-SiO_2制备了一种能在水下固化的弹性密封材料,其最佳配方体系为:100 phr MS-1086T弹性环氧树脂、80 phr憎水型固化剂、10%改性nano-SiO_2。采用万能材料试验机、动态力学热分析(DMA)和扫描电镜对密封胶材料进行了研究。结果表明,随着固化剂含量的增加,密封胶的断裂伸长率由99.50%增加到173.10%,拉伸强度由4.80 MPa减小到1.75 MPa,拉伸剪切强度由7.02 MPa减小到2.98 MPa。DMA结果表明,nanoSiO_2可使材料的玻璃化转变温度(Tg)升高到70.55℃,改性nano-SiO_2可使材料的Tg降低到8.36℃;模拟实验结果表明,该密封胶有良好的密封性能,同时在80℃条件下,使用寿命可达22.70年。
The underwater curing with high elasticity and high bonding ability sealant was fabricated using elastic epoxy resin and water-repelling curing agent. The best system was 100 phr MS-1086 T elastic epoxy resin,80 phr water-repelling curing agent and 10% oil soluble nano-SiO2（ H-nano-SiO2）. The property of sealant was investigated by universal material tester,DMA and scanning electron microscopy（ SEM）. The results indicate that when the addition of curing agent increases,the strain increases from 99. 50% to 173. 10%,the tensile strength and lap-shear strength reduce from4. 80 MPa to 1. 75 MPa and 7. 02 MPa to 2. 98 MPa,respectively. The results of DMA indicate that Tgrises up to 70. 55℃ with the increase of nano-SiO2 content,and Tgdecreases to 8. 36 ℃ with the increase of H-nano-SiO2 content. The simulation experiment shows that the system has good performance of splicing flexible riser at 80 ℃ and the working life is about 22. 70 year.
作者
苏高申
罗跃
李凡
陈思雅
杨欢
马超
Gaoshen Su;Yue Luo;Fan Li;Siya Chen;Huan Yang;Chao Ma(College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China;Key Laboratory of Oil and Gas Drilling and Production Engineering, Petroleum Engineering College, Yangtze University, Wuhan 430100, China;Research Institute of Petroleum Engineering, SINOPEC, Beijing 100101 , China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2018年第6期171-178,共8页
Polymer Materials Science & Engineering
关键词
水下固化
弹性密封胶
玻璃化转变温度
使用寿命
underwater curing
elastomeric sealant
glass-transition temperature
working life
